0000000000346548
AUTHOR
Gerald Huart
Le désherbage d’automne contre l’ergot du seigle les traitements herbicides d’automne, un levier chimique efficace de lutte contre l’ergot du seigle
Context and study: Trials in field allowed to show a link between a good grass weeding (blackgrass and rye grass) and extent of ergot contaminations. Makhteshim Agan France and Arvalis tested on 15 trials in 2011-2012, 2 ureas, as isoproturon against blackgrass, alone or in pro-gram with a sulfonylurea, to evaluate their indirect effect against ergot. Field trials were set up on sensitive crops to ergot (rye, wheat and triticale) infested with artificial ergot contaminations and weed seeds sensible to ALS. Contaminations were evaluated first in field on weeds and on crop, and then on harvest, by assessing sclerotia and alkaloids content in harvested samples. results: For all evaluation mean…
Autumn herbicides, an efficient chemical tool against ergot of grasses
Maktheshim Agan France analyzed 14 weeding trials, carried out in 2011-2012, to identify the indirect effect of weeding on the development of ergot. Field trials were set up on straw cereals (rye, wheat and triticale), with a contamination of ergot sclerotia and artificial infestation of grassy weeds susceptible to sulfonylureas. Two herbicides: isoproturon and chlortoluron, used alone or followed by a sulfonylurea, were compared to untreated control. All the assessments show that herbicides decreased the amount of sclerotia and even more the alkaloid content in harvest. This effect was higher with the herbicide program (urea applied in autumn /sulfonylurea at the end of winter). This study…